<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-bottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.cCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper" v-for="item of hotCities" :key="item.id"
          @click="handelchangeCity(item.name)"
          >
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area" v-for="(item,index) of cities"
           :key="index"
           :ref="index">
        <div class="title border-topbottom">{{index}}</div>
        <div class="item-list">
          <div class="item border-bottom"
               v-for="inItem of item"
               @click="handelchangeCity(inItem.name)"
          >{{inItem.name}}</div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
  import Bscroll from 'better-scroll'
  import {mapState,mapMutations} from 'vuex'
  export default {
    name: "city-list",
    props: {
      'hotCities': Array,
      'cities': Object,
      'letter': String
    },
    mounted() {
      this.scroll = new Bscroll(this.$refs.wrapper);
    },
    watch: {
      letter() {
        if (this.letter) {
          const temp = this.$refs[this.letter][0];
          this.scroll.scrollToElement(temp);
        }
      }
    },
    methods:{
      ...mapMutations(['changeCity'])//changeCity指向vuex的Mutation中的changeCity方法，...使得当前vue实例多了一个changeCity方法
      ,
      handelchangeCity(city){
        //this.$store.dispatch('changeCity',city);
        this.changeCity(city);
        this.$router.push('/');
      }
    },
    computed:{
      ...mapState({cCity:'city'})//输入对象cCity的引用指向vuex的State的city，...使得多了一个cCity的计算属性
    }

  }
</script>

<style lang="stylus" scoped>
  @import "~styles/variable.styl"
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc

  .border-bottom
    &:before
      border-color: #ccc

  .list
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    .title
      line-height: .54rem
      background: #eee
      padding-left: .2rem
      color: #666
      font-size: .26rem
    .button-list
      overflow: hidden
      padding: .1rem .6rem .1rem .1rem
      .button-wrapper
        float: left
        width: 33.33%
        .button
          margin: .1rem
          padding: .1rem 0
          text-align: center
          border: .02rem solid #ccc
          border-radius: .06rem
    .item-list
      .item
        line-height: .76rem
        height .76rem
        padding-left: .2rem
</style>
